Improvement in revolving grain-screens



F MILLS.

Grain Screen.

No. 106,949. Patented Aug. 30, 1870.

u, PETERS. Phnlo-lmwgnphen Wnhingtun. no.

tinned some;

runners MILLS, or MOUNT VERNON, morass.

Letters Patent No. 100,949, dated August 30, 187 0.

IMPROVEMENT IN REVOLVING GRAIN SCREENS.

The Schedule referred to in these Letters Patent and making part 01 thesame To all whom it may concern Be it known that I, FnAxoIs MILLS, ofMount Vernon, in the county of. Posey and-State .ot .-'Indi ana, haveinvented a new and. improved Revolving Screen for Cleaning Grain; and 1do hereby'declare' thatthelfollowing is a full, clear, and exactdescrip- Myimfentionhasfin its objectto furnish an intproved revolringscreen, for separating small seeds from ivheat or other grain, whichshall be simple in construction and effective in operation ;.,and

It consists iuthe construction and combination of the various parts ofthe machine, as hereinafter more fully described. I

A represents the box or caseQof'the machine, which is. made witlrlegs,of such length as to raise the machine to a convenient height.

B is the screcn,whicb is made :t apering,'aud in the shape of thefrustum. of :tpolygohal pyramid, and

which is rigidly connected with theisbatt C, so as to be carried withsaid shai't'iu itsjrerolution The screen iscoveredwith wire-cloth, ofsuch a fineness as ,to allow the small ,seeds,'whicb it is designed toremove, to pass through, and which the grain to be screened or cleanedcannot pass through.

As the small seeds pass through the screen 15, they fall upon theinclined bottom of the box A, and pass out ofthe machine through thespout I).

The grain is introduced through the pipe E, at the center of the smallerend of the screen B, which said smaller end of said screen is supportedby arms 12, the outer ends of which are attached to the end-plateof thescreen B, and the inner ends of which are attached to the shaft 0, thesaid arms being so formed f as to pass around the end of the pipe E, asshown in fig. 1.

As the grain passes back through the machine, it is kept stirred np bythe inner ribs b of the screen 13, and when it reaches the rear end ofthe said screen, it istake n up by the inclined blocks or-plates b,attached to the rear end plate of the screen B, at the rear sides of thedischarge-openings through said plate. 1

As the screened grain passes :out of the" screen 13, it falls throughthezspa'ce between the end of the screen-and the endof the box, andpasses out through thespout I being kept from again mixing with thesmall seeds by the cleats or flanges G, attached to the inner sides ofthe box A, at the end of the screen B, as shown in the drawing. I

Y The screen Bis revolved byaneans of a'crank, H,

attached to the projecting end of the journal of the shaft 0. r l

The pipe E passesou't through the forward end of tbeboxA.

, J is'the feed-hopper, which is suspended by jointed connections K tothe case A.

To the lower part of the inner hopper is attached adownward]y-projecting arm, N, the lower end of which rests upon thespur-wheel 0, attached to the shaft 0, so that, as the said shaft 0revolves, the hopper J will be jarred, to hasten the escape of the grainfrom the said hopper.

From the hopper J the grain passes into the pipe E, and passes thence tothe screen B, in the manner hereiubefore described.

Having thus described my invention,

\Vhat I claim as new, and desire to secure by Letters Patent, is-- Thecombination in the grain-screen B herein described, of the hingedhopper'J and lug N, with the sprocket-wheel O and shaft 6, allconstructed and arranged as shown and described, for the purposesWitnesses:

J AMES GHENY, WM. P. LEONARD.

